capstone/fuzz_disasmmaster: Use-of-uninitialized-value in isPrefixAtLocation

2018-06-17T07:26:42
ID OSSFUZZ-8942
Type ossfuzz
Reporter Google
Modified 2018-07-27T15:22:15

Description

Detailed report: https://oss-fuzz.com/testcase?key=5004316824829952

Project: capstone Fuzzer: libFuzzer_capstone_fuzz_disasmmaster Fuzz target binary: fuzz_disasmmaster Job Type: libfuzzer_msan_capstone Platform Id: linux

Crash Type: Use-of-uninitialized-value Crash Address: Crash State: isPrefixAtLocation getID decodeInstruction

Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_msan_capstone&range=201806130612:201806142009

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5004316824829952

Issue filed automatically.

See https://github.com/google/oss-fuzz/blob/master/docs/reproducing.md for more information.

This bug is subject to a 90 day disclosure deadline. If 90 days elapse without an upstream patch, then the bug report will automatically become visible to the public.

When you fix this bug, please * mention the fix revision(s). * state whether the bug was a short-lived regression or an old bug in any stable releases. * add any other useful information. This information can help downstream consumers.

If you need to contact the OSS-Fuzz team with a question, concern, or any other feedback, please file an issue at https://github.com/google/oss-fuzz/issues.